•
•
•
Keyboard
•
LSI
Controller frees the input/output (Z80-A based) processor
from keyboard scan and related tasks
• Located
in
a separate case for convenience
• Model 168 and Enhanced Model 12 are connected to the
display console via a
built~in.
coiled cord that exits at the lower,
back
part of the keyboard
• Standard typewriter keys, repeat key and eight general-purpose
function keys
• Four modes with the following priority (highest to lowest):
1 Unshift
2 Shift
3 Caps
4.
Control
Floppy Diskette Drives
Minimum
• One built-in, 8-inch, double-sided floppy diskette drive
Maximum
• One built-in and up to two external. 8-inch, double-sided,
floppy diskette drives (floppy diskette expansion unit needed for
two external drives)
Preventive Maintenance Interval
• Typical usage (3,000 power-on hours per year): Every 8000
power-on hours
• Heavy usage
(8,000 power-on hours per yertr): Fvery 5000
power-on hours
Required Media
• Radio Shack double- or single-sided, 8-inch floppy diskettes
• Enhanced Model
II:
Radio Shack single-sided, 8-inch floppy
diskettes
Data Transfer Rate
'IS
500,000 bits per second (except Track 0
which has 250,000 bps)
Diskette Life
is 3 5 million passes per track.
To
prevent limiting life
by improper handling, follow diskette-care recommendations.
61
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